Re: [PATCH v10 12/26] gunyah: vm_mgr: Add/remove user memory regions

[Srivatsa Vaddagiri]

* Elliot Berman <quic_eberman@xxxxxxxxxxx> [2023-02-14 13:24:16]:

> +int gh_vm_mem_alloc(struct gh_vm *ghvm, struct gh_userspace_memory_region *region)
> +{
> +	struct gh_vm_mem *mapping, *tmp_mapping;
> +	struct gh_rm_mem_entry *mem_entries;
> +	phys_addr_t curr_page, prev_page;
> +	struct gh_rm_mem_parcel *parcel;
> +	int i, j, pinned, ret = 0;
> +	size_t entry_size;
> +	u16 vmid;
> +
> +	if (!gh_api_has_feature(GH_API_FEATURE_MEMEXTENT))
> +		return -EOPNOTSUPP;
> +
> +	if (!region->memory_size || !PAGE_ALIGNED(region->memory_size) ||
> +		!PAGE_ALIGNED(region->userspace_addr) || !PAGE_ALIGNED(region->guest_phys_addr))
> +		return -EINVAL;

Check for wraps also:

        region->guest_phys_addr + region->memory_size > region->guest_phys_addr